bug修复

backend/database.py

@@ -22,6 +22,35 @@ async def get_db():
             raise
 
 
+# ────────────── CRUD 工具函数 ──────────────
+
+async def db_add(db: AsyncSession, obj, *, refresh: bool = False):
+    """创建记录并提交。refresh=True 会在提交后刷新对象（获取生成的 id 等）。"""
+    db.add(obj)
+    await db.flush()
+    if refresh:
+        await db.refresh(obj)
+    await db.commit()
+
+
+async def db_update(db: AsyncSession, obj, data: dict):
+    """批量更新字段并提交。data 一般来自 model_dump(exclude_unset=True)。"""
+    for key, value in data.items():
+        setattr(obj, key, value)
+    await db.commit()
+
+
+async def db_delete(db: AsyncSession, obj):
+    """删除记录并提交。"""
+    await db.delete(obj)
+    await db.commit()
+
+
+async def db_flush(db: AsyncSession):
+    """将待写操作刷到数据库（不提交事务），用于需要获取生成 ID 等中间状态的场景。"""
+    await db.flush()
+
+
 async def init_db():
     async with engine.begin() as conn:
         # 迁移旧表：acme_config → acme_configs